Hydraulic motor.



Patented Jan. 18, 1916.

L. LEWIS I T. E. TAGGART. HYDRAULIC MOTOR. APPLICATION FILED FEB. Is, 19m'.

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y@ @msl QE.- Taggart @Mor/nag 5 and THOMAS E. TAGCART,citizens of the @met v LLEWELYN LEWIS ANDl THOMAS E. TAGGART, or C'OLUMBIIS, OHIO, AssIGNoRs To THE AMERICAN y WATER MOTOR COMPANY, or, COLUMBUS, OHIO, A CORPORATION OE OHIO. f

IIYDRAULIC MOTOR.l

i VSpecification of Letters Patent. Patented Jan. 18, 1916.

Application led February 16, v1914. Serial No. 818,843.

To aZZ whom 'it may concern Be it known that-r we, LLEWELYN LEWIS and shoulders on the tubular parts-19 and 20. The opposite ends of the valve body where they project beyond the seat are threaded and carry valves 23 and 24 to open and close the ports 25 and26 respectively to the exhaust chamber. These valves are faced with leather as seenat 23 and 24a. Within the hollow valve body are headed pins 27 and 28 having their Shanks normally projected beyond the ends of the valves by aspring 29 lying Within the valve body between the heads of said pins. 30 and 31 are slot ports from the intak chamber 15. These ports are alternately opened and closed by the cup leathers 22 and 22u. The ends of the tubular valve body are of smaller diameter vthan the' valve seat but those ends are provided with radial lugs such as seen at 32 spaced apart to provide ample passages for water from port slot 30 or 31 into the adjacent end of the cylinder. Secured to the rim of the piston by means of a ring 33 are cup leathers 34. The ring 33 has formed with it a yoke 35 to which latter is connected a work rod 36 that extends through a stutling box 12a on the cylinder head 12. Located on the yoke 35 is a bumper plate 37 having pins 38 that pass through holes in the yoke 35 in position to abut against the cylinder head 1 The operation is this: In the position of the parts illustrated in Fig. 1 the piston is moving from left to right, the direction of the flow of water pressure being indicated by the arrows. The exhaust port 25 is closed while the exhaust port 26 is open. Water Howing through the slot port 30 passes into the cylinder at the left hand side of the piston and exerts its pressure on the piston moving it to the right and forces the water in the right hand end of the cylinder through the port 26 into the exhaust chamber 16 of the piston and thence out pipe 18. In time the pins 38 of the bumper plate Strike the cylinder head 12 and the bumper plate is held stationary while the piston continues to move to the right. The advancing pin 28 next strikes the bumper plate compressing the spring 29. Eventually the valve body strikes the bumper plate and as the pisto-n still continues to advance the valve is by the impact with the cylinder tubular parts 19 and 2O connected by a head shifted with reference to the piston so coupling 21, cup leathers 22 and 22aL being that the slot port 31 is Opened and the slot United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented a certain new and useful Improvement in Hydraulic Motors, of which the following is a specification.

The object of this invention is to provide an improved hydraulic :motor in which metallic closures for valves are avoided and softer material, such a's leather employed.

A further object is the provision of a construction in which the same spring is utilized for shifting the valve structure at the end of the stroke in each direction.

Further objects are the simplification and the" increasing Aeffectivenessv of the construction.

The invention is embodied in the example herein shown and described, the features of novelty being pointed out in the claims.

In the accompanying drawings, Figure l is a central longitudinal sectional view including the intake and exhaust pipes. Fig. 2 is a partial cross section on the line w-fw Fig. 1, looking toward the right. Fig. 3 is a similar section on the line w- Fig. 1, looking toward the left. Fig. 4 is a like section on the line y-z/ Fig. 1, looking toward the right. Fig. 5 is a cross section on the line .e-z Fig. 1, looking toward the left.

In the views 10 designates the cylinder, having heads 11 and 12. Within the cylinder is a piston 13 consisting of a hollow metallic structure having inner and outer annular walls forming an annular chamber that is divided into two compartments or chambers 15 and 16 by radial walls 14, 14a. For the purpose of illustration and description the chamber 15 may be treated as the intake chamber` in which case the chamber 16 is the exhaust. The central opening of the piston constitutes a seat for a reciprocating valve. The intake chamber 15 has connected with it a tube 17 that extends through the cylinder head 11 and the exhaust chamber 16 has connected to it a tube 18 that also extends through said head. The said tubes reciprocate with the piston.

In the central Opening of the piston is valve, the body of which, consists of two,j

interposed between the ends of the vcoupling port closed. The pressure of the spring ,insures a complete and prompt shifting of .the'valve body; rIhe shifting ofthe valve also causes the'closing'of'the exhaust port 26 by the valve 24. When the valve is thus shifted the Water flows into the rightV hand end of the piston therebyv exerting its pressureon the right hand side of the piston which is then moved towardy the left. The operation in moving the piston to the left llis' the same'as that first described exceptthat rthere being no need for a bumper. plate at scribed is repeated.

"Vhat We claim is: l.v In a hydraulic motor, a cylinder,a pisrtonr provided With an intakechamberfan exhaust chamber and aseat'fo-rja reciprocating valve, a hollovvreciprocat-ing yvalve in said seaty adapted to open and close the-ports from the intake chamber,- said;l chambers having suitable ports, valves to open and close the ports to the aforesaid exhaust chamber, pinsjin said reciprocating 'valve and a spring between said pinsi'to'hold the same projected beyond the ends of` the valve.

2."Inv a hydraulic motor, a cylinder, a piston therein provided with an intake, an exhaust chamber and a seat for a reciprocating valve, said.` exhaustv chamber having ports leading thereinto from the opposite sides of the piston and'saidfintakechamber having i ports leading .therefrom into the. valve seat, a hollow reciprocating valve in said seat adapted `to open and close the. ports' from the close the ports to the aforesaid exhaust chamber, pins in said hollowreciprocating valve and a spring between said pins to hold .the same projected beyond the endsfof the vvalve. I

.'Gopiesz cf this p atentimay-vbeobtained for-vecents eachfbyxaddressing. the Commissioner-.of Patents,

Washington, D. C.

intake chamberyan'd valves onthe end lof f. Athe reciprocating valve adapted to fopen and 

